A fourth suspect has been arrested after two men were attacked within two hours.
At 4am on Friday officers were called to an alleyway between Trottersfield and Cressing Road in Braintree after a victim had been assaulted and robbed of a iPad and wallet.
Two hours later a second man was punched in the face in Cressing Road.
Following the latter attack three men were arrested and were bailed until March next year.
A fourth man, a 23-year-old from Braintree, who was also arrested on suspicion of assault and robbery, has also been bailed.